Consistently use "error code" instead of "status code" for stream and session related errors
Changed stream priority to be 31 bits long instead of 3 bits.
SETTINGS related changes as proposed in Tokyo

Added a note that settigs persistence might be removed in a future version.
Added a requrement on both sides to send SETTINGS as the first frame
after establishing an HTTP/2.0 connection.

Also added placeholder for the "magic" sequence before sending any frames.
Update proposed clarification text in all documents.
Merge branch 'master' of github.com:http2/http2-spec
update issues
Merge pull request #32 from willchan/MaxNumConcurrentStreams

MaxNumConcurrentStreams: Update proposed clarification text in all documents. Fixes #19.
Major editorial cleanup for frame header changes.
Updating .html with changes.
Merging (with apparently no change).
Adding flow control warning.  Clarifying text around MAX_CONCURRENT_STREAMS.
Reformatting.
Updating flow control section for #16.
Removing CREDENTIAL frame (#39)
Clarifying stream creation and identification text (#30).
Updating references (#4).
Remove HTML from master.
update README
Add link to text version.
Correct README title.